Technical Manual Hitachi ZX240-5A, ZX240LC-5A, ZX250H-5A, ZX250LCH-5A, ZX250K-5A, ZX250LCK-5A | TODCY90-EN-00 (2017.04.26)

Technical Manual Hitachi ZX240-5A, ZX240LC-5A, ZX250H-5A, ZX250LCH-5A, ZX250K-5A, ZX250LCK-5A TODCY90-EN-00 (2017.04.26) (Preview)

TODCY90-EN-00
INTRODUCTION
SYMBOL AND ABBREVIATION
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
Group 1 Specifications
Specifications
Working Ranges
Group 2 Component Layout
Main Component
Electrical System (Overview)
Electrical System (Rear Tray)
Electrical System (Switch Panel)
Electrical System (Around Air Cleaner)
Electrical System (Relays, etc.)
Components Related with Engine
Components Related with Pump Device
Around Pump Device
Components Related with Control Valve
Components Related with Signal Control Valve
Components Related with Swing Device
Travel Device
3-Spool Solenoid Valve Unit
Layout of Attachment Spec. Parts
Control Valve Side of Hydraulic Oil Tank
Group 3 Component Specifications
Engine
Engine Accessories
Hydraulic Component
Electrical Component
SECTION 2 SYSTEM
Group 1 Controller
Outline
CAN Circuit
Group 2 Control System
Outline
Engine Control
Pump Control
Valve Control (Standard)
Valve Control (Optional)
Other Control
Group 3 ECM System
Outline
Fuel Injection Control
Fuel Injection Amount Correction Control
EGR Control
Preheating Control
Alarm Control
Group 4 Hydraulic System
Outline
Pilot Circuit
Main Circuit
Breaker/Pulverizer/Crusher Circuit (Optional)
Group 5 Electrical System
Outline
Main Circuit
Electric Power Circuit (Key Switch: OFF)
CAN Circuit
Accessory Circuit
Starting Circuit (Key Switch: START)
Charging Circuit (Key Switch: ON)
Surge Voltage Prevention Circuit
Pilot Shut-Off Circuit (Key switch: ON)
Auto Shut-Down Circuit/Automatic Engine Stop Circuit at Low Temperature
Engine Stop Circuit
Monitor Circuit
Security Circuit
Radio Circuit
Air Conditioner Circuit
Accessory Circuit
Work Light Circuit
Wiper/Washer Circuit
Cab Light Circuit
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Outline
Main Pump
Regulator
Solenoid Valve
Pilot Pump
Pump Delivery Pressure Sensor
Pump Control Pressure Sensor
Group 2 Swing Device
Outline
Swing Reduction Gear
Swing Motor
Swing Parking Brake
Valve Unit
Group 3 Control Valve
Outline
Hydraulic Circuit
Flow Combiner Valve
Main Relief Valve
Overload Relief Valve (with Make-Up Function)
Regenerative Valve
Anti-Drift Valve
Flow Rate Control Valve
Digging Regenerative Valve
Boom Lower Meter-In Cut Valve
Auxiliary Flow Combiner Valve and Bypass Shut-Out Valve
Group 4 Pilot Valve
Outline
Operation (Front Attachment / Swing and Travel Pilot Valves)
Operation (Auxiliary Pilot Valve)
Shockless Function (Only for Travel Pilot Valve)
Group 5 Travel Device
Outline
Travel Reduction Gear
Travel Motor
Parking Brake
Travel Brake Valve
Overload Relief Valve
Travel Mode Control
Group 6 Signal Control Valve
Outline
Pilot Port
Shuttle Valve
Shockless Valve
Pump 1 and 2 Flow Rate Control Valve
Bucket Flow Rate Control Valve Control Spool, Flow Combiner Valve Control Spool, Swing Parking Brake Release Spool, Arm 1 Flow Rate Control Valve Control Spool
Group 7 Others (Upperstructure)
Pilot Shut-Off Solenoid Valve
Solenoid Valve
Pilot Relief Valve
Recirculation Valve (Option)
Group 8 Others (Undercarriage)
Swing Bearing
Center Joint
Track Adjuster (Front Idler Integrated Type)
SERVICE MANUAL REVISION REQUEST FORM